1Convenient and Versatile: The set includes 5 flange covers, duckbill valves and 2 diaphragms, providing you with all the necessary accessories for your bust pump. 2Perfect Fit: The flange cover duckbill valves diaphragm set comes with multiple flange sizes of 13mm, 15mm, 17mm, 19mm, 21mm, allowing you to find the perfect fit for your comfort and needs. 3Safe and Reliable: Made of premium silicone material, these bust pump parts are safe and reliable, ensuring a safe pumping experience for both you and your baby. 4Easy to Clean: The silicone material is easy to clean, saving you time and effort in maintaining proper hygiene for your bust pump. 5Portable and Lightweight: The compact design of the accessories parts makes them easy to carry and use on the go, ensuring you can pump milk conveniently wherever you are. 5 xFlangeCover 2 xDuckbillValve 2 xDiaphragm